Between Guadiaro and Pueblo Nuevo de Guadiaro lie the remains of a small Roman town called Barbésula, which was dedicated mainly to the fish salting industry. Kilns used in the manufacture of amphoras (clay vessels) for the export of Garum have been discovered here. Due to its location at the mouth of the Guadiaro River valley, it may also have been an import and export center for agricultural products. The remains of a temple dedicated to Diana have also been excavated onsite.
Artifacts such as honorary and funerary inscriptions on stones are preserved in the Cortijo de Guadiaro and the Museum of Cádiz. There is little to be seen today on the slice of land between Guadiaro and Pueblo Nuevo de Guadiaro. Opposite Cortijo de los Canos on Avenida Ciro Gill there is a pronounced hillock; the hill is overgrown, fenced off, and would be a difficult climb. There used to be a small green metal sign naming the site.